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Nu. 6ll,928. Patented 06L 4, I898. W. NAAB & R. E. GRANT.

SEWING MACHINE MOTOR.

(No lludel.)

Witnesses. Inventor.

William lVdd b Hoba t-E. 62712112 y Attor ey THE norms PETERS co.PNOTO-LITHQ. wunmmou. a. c,

iINirn STATES ATENT anion.

WILLIAM NAAB AND ROBERT E. GRANT, OF GRAND RAPIDS, MICHIGAN, ASSIGNORSOF ONE-THIRD TO JAMES OPPENNEER, OF SAME PLACE.

SEWING-MACHINE MOTOR.

SPECIFICATION forming part of Letters Patent No. 611,928, dated October4, 1898. Application filed November 27, 1397. Serial No. 659,981- (Nomodel.)

T all whom it may concern.-

Be it known that we, WILLIAM NAAB and ROBERT E. GRANT, citizens of theUnited States, residing at Grand Rapids, in the county of Kent and Stateof Michigan, have invented certain new and useful Improvements in Motorsfor Use upon Sewing-Machines, of which the following is a specification.

' The objects of our invention are, first, to facilitate the applicationof power to sewingmachines and other small machinery, and,

second, to provide for locking the power, so that it cannot expenditself when the machinery is detached from the power. To attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich Figure 1 is an elevation of a sewing-Ina chine with the casecontaining a spring-power open to show the relative position of thepower and the brake. Fig. 2 is an end elevation of the same with aportion of the panel cut away for a like purpose. Fig. 3 is a sectionalend view of the case, showing the position and relative action of thelock; and Fig. ashows the manner of locking the springcylinder in aspring-motor for sewing-machines.

Similar letters and numerals refer to similar parts throughout theseveral views.

A is the sewing-machine head.

B is the frame, O is the balance-wheel, and D is the belt-wheel, of anordinary sewingmachine. The motor in this case consists of the train ofgear F to F, actuated by a spring or springs in the drum 1. Thegearwheel F is secured to the end of the drum, which is mounted on theshaft I to revolve freely when the shaft is idle and is actuated by thespring I, secured at one end to the shaft I and at the other end to theinner surface of the drum I in the usual manner of attaching this classof springs to transmit power.

The shaft 1 is held to place when inducing tension upon the spring bythe pawl and ratchet G G in the usual manner, and the power istransmitted from the train of gear to the pulley D bya belt E from thedriving pulley or wheel E.

Our brake mechanism consists of a kneepad J, m ounted 011 an adjustablearm J ,which in turn is supported on the revoluble pivot j just belowthe top of the frame B, so that the arm j, projecting from the pivot j,will stand directly under the center of the balance wheel O and inposition to actuate the brake K, which acts directly on the lowerportion of the balance-wheel and has a stem is, which projects downthrough the top of the machine-frame and rests on the end of the arm j,so that the throwing down of this arm, which is accomplished by pressingthe knee-pad J back with the knee, as indicated by the dotted lines inFig. 1, will allow the brake to drop away from the balance-wheel and thetension of the spring I to cause the machine to run. It will be readilyseen that the normal position of the brake is in close contact with thebalance-wheel, in which position it is held by the spring K.

The lock for preventing the motor from eX- pending its power when theconnections with the machine are broken consists of a pawl f, pivoted tothe frame, as ate, and having an arm projecting up through the table, asat f, in easy reach of the operator, and an incline, as f, to hold itout of contact when not .desired to lock the motor. The locking of themotor is accomplished by throwing the pawl f in contact with thegear-wheel F, as indicated in Fig. 3, and the unlocking of the same isaccomplished by raisingit out ofsuch contact, as indicated by the dottedlines.

Our motor consists of a spring I, confined v in a drum G, one end' ofsaid spring being attached to said drum and the other end attached tothe driving-shaft I. To one end of the shaft I we attach a ratchet-wheelG,

which meshes With and drives gear 3, which in turn is attached to gear 4to drive the wheel F and with it the drive-pulley E, which latter weconnect with the pulleyD by abelt E to transmit the motion of the motorto the needle-shaft of the machine.

Having thus fully described our invention, what We claim as new, anddesire to secure by Letters Patent of the United States, is-

In combination, a motor having a tensionshaft, a pawl and ratchet foranchoring said shaft, an actuating-spring and transmittingdrum, adriving-gear on said drum, a train of multiplying-gear connecting saiddrum with a driving-pulley, a belt connecting said driving-pulley Withthe driven pulley of the machine to transmit power and motion thereto;with a brake mechanism consisting of a rocker-shaft pivoted below thetable of the machine, an arm projecting down from said shaft and thelower end carried laterally to position to be conveniently engaged bythe knee of the operator, a spring to hold said arm to normal position,a second arm extending horizontally from said shaft to position toactuate abrake directly under the balance- Wheel of the machine, astandard passing through the table and resting on the horizontal arm,and a friction-brake attached to the upper end of said standard inposition to he held, normally, in contact with the balancewheel,substantially as and for the purpose set forth.

Signed at Grand Rapids, Michigan, November 20, 1897.

WILLIAM NAAB. ROBERT E. GRANT. In presence of- JAMES OPPENNEER,

ITHIEL .l'. CILLEY.

